Replace the additive LINKEDIN_EXTRA_SCOPES approach with a single
full-override env var per flow, exploded into an array at the config
layer (config/trypost.php -> platforms.linkedin{,-page}.scopes). This
keeps env values as plain comma-separated strings, lets self-hosters
override the entire set in one place, and removes the controller-side
scope-merge logic.
- config/trypost.php: explode LINKEDIN_SCOPES / LINKEDIN_PAGE_SCOPES
into the scopes arrays (deprecated r_basicprofile stays out of the
personal default)
- LinkedInController: drop resolveScopes(), read config scopes directly
- LinkedInPageController: drop the hardcoded $scopes property, read
config scopes at both call sites
- tests: drive the connect scope assertions from config overrides
- .env.example, docker/.env.docker.example: document LINKEDIN_SCOPES
and LINKEDIN_PAGE_SCOPES